Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/galaxy/util/sockets.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 import random
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2 import shlex
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3 import socket
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4 import subprocess
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6
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7 def unused_port(range=None):
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8 if range:
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9 return __unused_port_on_range(range)
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10 else:
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11 return __unused_port_rangeless()
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14 def __unused_port_rangeless():
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15 # TODO: Allow ranges (though then need to guess and check)...
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16 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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17 s.bind(('localhost', 0))
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18 addr, port = s.getsockname()
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19 s.close()
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20 return port
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23 def __unused_port_on_range(range):
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24 assert range[0] and range[1]
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25
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26 # Find all ports that are already occupied
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27 cmd_netstat = shlex.split("netstat tuln")
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28 p1 = subprocess.Popen(cmd_netstat, stdout=subprocess.PIPE)
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29
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30 occupied_ports = set()
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31 for line in p1.stdout.read().split('\n'):
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32 if line.startswith('tcp') or line.startswith('tcp6'):
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33 col = line.split()
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34 local_address = col[3]
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35 local_port = local_address.split(':')[1]
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36 occupied_ports.add(int(local_port))
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37
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38 # Generate random free port number.
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39 while True:
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40 port = random.randrange(range[0], range[1])
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41 if port not in occupied_ports:
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42 break
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43 return port